This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 45 |
| 3 | 55 |
| 4 | 435 |
| 5 | 34453 |
| 6 | 455535 |
| 7 | 3355345 |
| 8 | 3544453 |
| 9 | 45453345 |
| 10 | 334434453 |
| 11 | 355444453 |
| 12 | 3433345545 |
| 13 | 4544333445 |
| 14 | 5435334453 |
| 15 | 35554444453 |
| 16 | 44555453355 |
| 17 | 3555544444453 |
| 18 | 53443433535355 |
| 19 | 355555444444453 |
| 20 | 454555345444453 |
| 21 | 5355435453444453 |
| 22 | 35455445544444555 |